body{
    user-select: none;
}
h1{
    font-size: 30px;
    text-align: center;
    line-height: 100px;
    color: #fff;
    font-weight: bold;
}

.option{
    margin: 70px auto;
    width: 200px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    color: #4682b4;
    background-color: #f5deb3;
    border-radius: 5px;
    border: 1px solid #cccccc;
    cursor: pointer;
}

.small img{
  width: 50px;
}

.big img{
  width: 60px;
}

.enemy{
    position: absolute;
}

.myPlane{
    position: absolute;
    width: 60px;
}

.plane-img{
    width: 100%;
}

.biu{
    width: 50px;
    height: 60px;

    position: absolute;
}

.score{
    margin: 100px auto;
    width: 300px;
    height: 120px;
    background-color: black;
    border: 4px double #fff;
    color: #fff;
    font-size: 18px;
    padding: 5px;
}

.score p{
    margin: 20px 0;
    width: 100%;
    height: 50px;
    line-height: 50px;
    font-size: 40px;
    color: cornflowerblue;
    font-weight: bold;
    text-align: center;
}
.again{
    position: absolute;
    bottom: 50px;
    right: 0;
    left: 0;
    margin: auto;
    width: 150px;
    height: 40px;
    text-align: center;
    line-height: 40px;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    border-radius: 10px;
    background: #000;
    cursor: pointer;
}

.record{
    position: absolute;
    top: 0;
    left: 0;
    width: 50px;
    height: 30px;
    line-height: 30px;
    border: 2px solid #ccc;
    background-color: rgba(0,0,0,0.1);
    color: #fff;
    font-weight: bold;
    text-align: center;
}

.hp{
    position: absolute;
    top: -15px;
    border: 1px solid red;
}

.small .hp{
  width: 60px;
  height: 5px;
  left: -6px;
}

.big .hp{
    width: 80px;
    height: 5px;
    left: -11px;
}

.hp div{
    width: 100%;
    height: 100%;
    background-color: red;
}